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- Committer: Teddy Hogeborn
- Date: 2011-04-02 06:37:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20110402063718-13ldrcuu0t33sdc4
* mandos: Tolerate restarting Avahi servers. Also Changed to new
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import functools
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import cPickle as pickle
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import multiprocessing
67
import types
68
import binascii
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import tempfile
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import itertools
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import collections
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65
73
66
import dbus
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import dbus.service
88
81
except ImportError:
89
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.8"
95
stored_state_file = "clients.pickle"
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97
logger = logging.getLogger()
98
syslogger = None
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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syslogger = (logging.handlers.SysLogHandler
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(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
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logger.addHandler(syslogger)
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128
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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class PGPError(Exception):
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"""Exception if encryption/decryption fails"""
140
pass
141
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
154
return self
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def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
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160
def __del__(self):
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self._cleanup()
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def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
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187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
196
+ self.gnupgargs,
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stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
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85
version = "1.3.0"
86
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
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class AvahiError(Exception):
226
104
def __init__(self, value, *args, **kwargs):
227
105
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
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class AvahiServiceError(AvahiError):
232
111
pass
243
122
Used to optionally bind to the specified interface.
244
123
name: string; Example: 'Mandos'
245
124
type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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See <http://www.dns-sd.org/ServiceTypes.html>
247
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port: integer; what port to announce
248
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
256
135
bus: dbus.SystemBus()
257
136
"""
258
259
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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self.server = None
275
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self.bus = bus
276
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self.entry_group_state_changed_match = None
277
278
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def rename(self):
279
156
"""Derived from the Avahi example code"""
280
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if self.rename_count >= self.max_renames:
282
159
" after %i retries, exiting.",
283
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self.rename_count)
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raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
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logger.info("Changing Zeroconf service name to %r ...",
288
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self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
168
% self.name))
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169
self.remove()
290
170
try:
291
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self.add()
292
172
except dbus.exceptions.DBusException as error:
293
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
294
174
self.cleanup()
295
175
os._exit(1)
296
176
self.rename_count += 1
297
298
177
def remove(self):
299
178
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
300
186
if self.entry_group_state_changed_match is not None:
301
187
self.entry_group_state_changed_match.remove()
302
188
self.entry_group_state_changed_match = None
303
if self.group is not None:
304
self.group.Reset()
305
306
189
def add(self):
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190
"""Derived from the Avahi example code"""
308
191
self.remove()
309
if self.group is None:
310
self.group = dbus.Interface(
311
self.bus.get_object(avahi.DBUS_NAME,
312
self.server.EntryGroupNew()),
313
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
197
self.entry_group_state_changed_match = (
315
198
self.group.connect_to_signal(
316
'StateChanged', self.entry_group_state_changed))
199
'StateChanged', self .entry_group_state_changed))
317
200
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
201
self.name, self.type)
319
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self.group.AddService(
325
208
dbus.UInt16(self.port),
326
209
avahi.string_array_to_txt_array(self.TXT))
327
210
self.group.Commit()
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329
211
def entry_group_state_changed(self, state, error):
330
212
"""Derived from the Avahi example code"""
331
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logger.debug("Avahi entry group state change: %i", state)
337
219
self.rename()
338
220
elif state == avahi.ENTRY_GROUP_FAILURE:
339
221
logger.critical("Avahi: Error in group state changed %s",
340
str(error))
341
raise AvahiGroupError("State changed: {!s}"
342
.format(error))
343
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
344
225
def cleanup(self):
345
226
"""Derived from the Avahi example code"""
346
if self.group is not None:
347
try:
348
self.group.Free()
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
351
pass
352
self.group = None
353
227
self.remove()
354
355
228
def server_state_changed(self, state, error=None):
356
229
"""Derived from the Avahi example code"""
357
230
logger.debug("Avahi server state change: %i", state)
363
236
avahi.SERVER_FAILURE:
364
237
"Zeroconf server failure" }
365
238
if state in bad_states:
366
if bad_states[state] is not None:
367
if error is None:
368
logger.error(bad_states[state])
369
else:
370
logger.error(bad_states[state] + ": %r", error)
371
self.cleanup()
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
372
242
elif state == avahi.SERVER_RUNNING:
373
243
self.add()
374
244
else:
375
if error is None:
376
logger.debug("Unknown state: %r", state)
377
else:
378
logger.debug("Unknown state: %r: %r", state, error)
379
245
logger.debug("Unknown state: %r", state)
380
246
def activate(self):
381
247
"""Derived from the Avahi example code"""
382
248
if self.server is None:
390
256
self.server_state_changed(self.server.GetState())
391
257
392
258
393
class AvahiServiceToSyslog(AvahiService):
394
def rename(self):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
400
.format(self.name)))
401
return ret
402
403
404
259
class Client(object):
405
260
"""A representation of a client host served by this server.
406
261
407
262
Attributes:
408
approved: bool(); 'None' if not yet approved/disapproved
263
_approved: bool(); 'None' if not yet approved/disapproved
409
264
approval_delay: datetime.timedelta(); Time to wait for approval
410
265
approval_duration: datetime.timedelta(); Duration of one approval
411
266
checker: subprocess.Popen(); a running checker process used
418
273
instance %(name)s can be used in the command.
419
274
checker_initiator_tag: a gobject event source tag, or None
420
275
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
423
276
current_checker_command: string; current running checker_command
277
disable_hook: If set, called by disable() as disable_hook(self)
424
278
disable_initiator_tag: a gobject event source tag, or None
425
279
enabled: bool()
426
280
fingerprint: string (40 or 32 hexadecimal digits); used to
429
283
interval: datetime.timedelta(); How often to start a new checker
430
284
last_approval_request: datetime.datetime(); (UTC) or None
431
285
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
436
287
name: string; from the config file, used in log messages and
437
288
D-Bus identifiers
438
289
secret: bytestring; sent verbatim (over TLS) to client
439
290
timeout: datetime.timedelta(); How long from last_checked_ok
440
291
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
292
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
444
disabled, or None
445
server_settings: The server_settings dict from main()
446
293
"""
447
294
448
295
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
452
298
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
455
"interval": "PT2M",
456
"checker": "fping -q -- %%(host)s",
457
"host": "",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
461
"enabled": "True",
462
}
463
299
464
300
@staticmethod
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
471
"""
472
settings = {}
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
476
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
482
"enabled")
483
484
client["fingerprint"] = (section["fingerprint"].upper()
485
.replace(" ", ""))
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
491
"rb") as secfile:
492
client["secret"] = secfile.read()
493
else:
494
raise TypeError("No secret or secfile for section {}"
495
.format(section))
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
508
509
return settings
510
511
def __init__(self, settings, name = None, server_settings=None):
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
512
322
self.name = name
513
if server_settings is None:
514
server_settings = {}
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
519
520
if self.enabled:
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
525
+ self.timeout)
526
else:
527
self.last_enabled = None
528
self.expires = None
529
323
if config is None:
324
config = {}
530
325
logger.debug("Creating client %r", self.name)
531
326
# Uppercase and remove spaces from fingerprint for later
532
327
# comparison purposes with return value from the fingerprint()
533
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
534
331
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
537
538
# attributes specific for this server instance
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
539
351
self.checker = None
540
352
self.checker_initiator_tag = None
541
353
self.disable_initiator_tag = None
542
354
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
543
356
self.current_checker_command = None
544
self.approved = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
545
361
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
548
.Lock()))
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
553
554
for name, t in inspect.getmembers(type(self),
555
lambda obj:
556
isinstance(obj,
557
property)):
558
if not name.startswith("_"):
559
self.client_structure.append(name)
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
560
367
561
# Send notice to process children that client state has changed
562
368
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
565
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
566
373
def enable(self):
567
374
"""Start this client's checker and timeout hooks"""
568
375
if getattr(self, "enabled", False):
569
376
# Already enabled
570
377
return
571
self.expires = datetime.datetime.utcnow() + self.timeout
572
self.enabled = True
378
self.send_changedstate()
573
379
self.last_enabled = datetime.datetime.utcnow()
574
self.init_checker()
575
self.send_changedstate()
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
576
392
577
393
def disable(self, quiet=True):
578
394
"""Disable this client."""
579
395
if not getattr(self, "enabled", False):
580
396
return False
581
397
if not quiet:
398
self.send_changedstate()
399
if not quiet:
582
400
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
401
if getattr(self, "disable_initiator_tag", False):
584
402
gobject.source_remove(self.disable_initiator_tag)
585
403
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
404
if getattr(self, "checker_initiator_tag", False):
588
405
gobject.source_remove(self.checker_initiator_tag)
589
406
self.checker_initiator_tag = None
590
407
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
591
410
self.enabled = False
592
if not quiet:
593
self.send_changedstate()
594
411
# Do not run this again if called by a gobject.timeout_add
595
412
return False
596
413
597
414
def __del__(self):
415
self.disable_hook = None
598
416
self.disable()
599
417
600
def init_checker(self):
601
# Schedule a new checker to be started an 'interval' from now,
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
606
(int(self.interval
607
.total_seconds() * 1000),
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
613
(int(self.timeout
614
.total_seconds() * 1000),
615
self.disable))
616
# Also start a new checker *right now*.
617
self.start_checker()
618
619
418
def checker_callback(self, pid, condition, command):
620
419
"""The checker has completed, so take appropriate actions."""
621
420
self.checker_callback_tag = None
622
421
self.checker = None
623
422
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
626
425
logger.info("Checker for %(name)s succeeded",
627
426
vars(self))
628
427
self.checked_ok()
630
429
logger.info("Checker for %(name)s failed",
631
430
vars(self))
632
431
else:
633
self.last_checker_status = -1
634
432
logger.warning("Checker for %(name)s crashed?",
635
433
vars(self))
636
434
637
435
def checked_ok(self):
638
"""Assert that the client has been seen, alive and well."""
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
639
441
self.last_checked_ok = datetime.datetime.utcnow()
640
self.last_checker_status = 0
641
self.bump_timeout()
642
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
645
if timeout is None:
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
655
446
656
447
def need_approval(self):
657
448
self.last_approval_request = datetime.datetime.utcnow()
662
453
If a checker already exists, leave it running and do
663
454
nothing."""
664
455
# The reason for not killing a running checker is that if we
665
# did that, and if a checker (for some reason) started running
666
# slowly and taking more than 'interval' time, then the client
667
# would inevitably timeout, since no checker would get a
668
# chance to run to completion. If we instead leave running
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
669
460
# checkers alone, the checker would have to take more time
670
461
# than 'timeout' for the client to be disabled, which is as it
671
462
# should be.
673
464
# If a checker exists, make sure it is not a zombie
674
465
try:
675
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
677
pass
678
except OSError as error:
679
if error.errno != errno.ECHILD:
680
raise
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
681
471
else:
682
472
if pid:
683
473
logger.warning("Checker was a zombie")
686
476
self.current_checker_command)
687
477
# Start a new checker if needed
688
478
if self.checker is None:
689
# Escape attributes for the shell
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
693
479
try:
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s"',
697
self.checker_command, exc_info=error)
698
return True # Try again later
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
699
498
self.current_checker_command = command
700
499
try:
701
500
logger.info("Starting checker %r for %s",
704
503
# in normal mode, that is already done by daemon(),
705
504
# and in debug mode we don't want to. (Stdin is
706
505
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
709
# created wnull.
710
popen_args = {}
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
714
"stderr": wnull })
715
506
self.checker = subprocess.Popen(command,
716
507
close_fds=True,
717
shell=True, cwd="/",
718
**popen_args)
719
except OSError as error:
720
logger.error("Failed to start subprocess",
721
exc_info=error)
722
return True
723
self.checker_callback_tag = (gobject.child_watch_add
724
(self.checker.pid,
725
self.checker_callback,
726
data=command))
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
try:
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
730
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
731
519
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
735
exc_info=error)
736
return True
737
raise
738
if pid:
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
520
logger.error("Failed to start subprocess: %s",
521
error)
741
522
# Re-run this periodically if run by gobject.timeout_add
742
523
return True
743
524
750
531
return
751
532
logger.debug("Stopping checker for %(name)s", vars(self))
752
533
try:
753
self.checker.terminate()
534
os.kill(self.checker.pid, signal.SIGTERM)
754
535
#time.sleep(0.5)
755
536
#if self.checker.poll() is None:
756
# self.checker.kill()
537
# os.kill(self.checker.pid, signal.SIGKILL)
757
538
except OSError as error:
758
539
if error.errno != errno.ESRCH: # No such process
759
540
raise
760
541
self.checker = None
761
542
762
763
543
def dbus_service_property(dbus_interface, signature="v",
764
544
access="readwrite", byte_arrays=False):
765
545
"""Decorators for marking methods of a DBusObjectWithProperties to
776
556
# "Set" method, so we fail early here:
777
557
if byte_arrays and signature != "ay":
778
558
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
559
" signature %r" % signature)
780
560
def decorator(func):
781
561
func._dbus_is_property = True
782
562
func._dbus_interface = dbus_interface
790
570
return decorator
791
571
792
572
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
795
796
Usage:
797
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
802
"false"}
803
"""
804
def decorator(func):
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
808
return func
809
return decorator
810
811
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
814
Usage:
815
816
@dbus_service_property("org.example.Interface", signature="b",
817
access="r")
818
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property."
820
"EmitsChangedSignal": "false"})
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
823
"""
824
def decorator(func):
825
func._dbus_annotations = annotations
826
return func
827
return decorator
828
829
830
573
class DBusPropertyException(dbus.exceptions.DBusException):
831
574
"""A base class for D-Bus property-related exceptions
832
575
"""
833
pass
576
def __unicode__(self):
577
return unicode(str(self))
578
834
579
835
580
class DBusPropertyAccessException(DBusPropertyException):
836
581
"""A property's access permissions disallows an operation.
846
591
847
592
class DBusObjectWithProperties(dbus.service.Object):
848
593
"""A D-Bus object with properties.
849
594
850
595
Classes inheriting from this can use the dbus_service_property
851
596
decorator to expose methods as D-Bus properties. It exposes the
852
597
standard Get(), Set(), and GetAll() methods on the D-Bus.
853
598
"""
854
599
855
600
@staticmethod
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
858
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
861
"""
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
False)
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
864
603
865
def _get_all_dbus_things(self, thing):
604
def _get_all_dbus_properties(self):
866
605
"""Returns a generator of (name, attribute) pairs
867
606
"""
868
return ((getattr(athing.__get__(self), "_dbus_name",
869
name),
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
872
for name, athing in
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
875
610
876
611
def _get_dbus_property(self, interface_name, property_name):
877
612
"""Returns a bound method if one exists which is a D-Bus
878
613
property with the specified name and interface.
879
614
"""
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
882
(cls,
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
887
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
888
625
# No such property
889
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
627
+ interface_name + "."
914
651
# The byte_arrays option is not supported yet on
915
652
# signatures other than "ay".
916
653
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
921
for byte in value))
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
922
657
prop(value)
923
658
924
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
926
661
def GetAll(self, interface_name):
927
662
"""Standard D-Bus property GetAll() method, see D-Bus
928
663
standard.
929
664
930
665
Note: Will not include properties with access="write".
931
666
"""
932
properties = {}
933
for name, prop in self._get_all_dbus_things("property"):
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
934
669
if (interface_name
935
670
and interface_name != prop._dbus_interface):
936
671
# Interface non-empty but did not match
940
675
continue
941
676
value = prop()
942
677
if not hasattr(value, "variant_level"):
943
properties[name] = value
678
all[name] = value
944
679
continue
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
948
683
949
684
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
950
685
out_signature="s",
951
686
path_keyword='object_path',
952
687
connection_keyword='connection')
953
688
def Introspect(self, object_path, connection):
954
"""Overloading of standard D-Bus method.
955
956
Inserts property tags and interface annotation tags.
689
"""Standard D-Bus method, overloaded to insert property tags.
957
690
"""
958
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
959
692
connection)
966
699
e.setAttribute("access", prop._dbus_access)
967
700
return e
968
701
for if_tag in document.getElementsByTagName("interface"):
969
# Add property tags
970
702
for tag in (make_tag(document, name, prop)
971
703
for name, prop
972
in self._get_all_dbus_things("property")
704
in self._get_all_dbus_properties()
973
705
if prop._dbus_interface
974
706
== if_tag.getAttribute("name")):
975
707
if_tag.appendChild(tag)
976
# Add annotation tags
977
for typ in ("method", "signal", "property"):
978
for tag in if_tag.getElementsByTagName(typ):
979
annots = dict()
980
for name, prop in (self.
981
_get_all_dbus_things(typ)):
982
if (name == tag.getAttribute("name")
983
and prop._dbus_interface
984
== if_tag.getAttribute("name")):
985
annots.update(getattr
986
(prop,
987
"_dbus_annotations",
988
{}))
989
for name, value in annots.items():
990
ann_tag = document.createElement(
991
"annotation")
992
ann_tag.setAttribute("name", name)
993
ann_tag.setAttribute("value", value)
994
tag.appendChild(ann_tag)
995
# Add interface annotation tags
996
for annotation, value in dict(
997
itertools.chain.from_iterable(
998
annotations().items()
999
for name, annotations in
1000
self._get_all_dbus_things("interface")
1001
if name == if_tag.getAttribute("name")
1002
)).items():
1003
ann_tag = document.createElement("annotation")
1004
ann_tag.setAttribute("name", annotation)
1005
ann_tag.setAttribute("value", value)
1006
if_tag.appendChild(ann_tag)
1007
708
# Add the names to the return values for the
1008
709
# "org.freedesktop.DBus.Properties" methods
1009
710
if (if_tag.getAttribute("name")
1024
725
except (AttributeError, xml.dom.DOMException,
1025
726
xml.parsers.expat.ExpatError) as error:
1026
727
logger.error("Failed to override Introspection method",
1027
exc_info=error)
728
error)
1028
729
return xmlstring
1029
730
1030
731
1031
def datetime_to_dbus(dt, variant_level=0):
1032
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1033
if dt is None:
1034
return dbus.String("", variant_level = variant_level)
1035
return dbus.String(dt.isoformat(),
1036
variant_level=variant_level)
1037
1038
1039
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1040
"""A class decorator; applied to a subclass of
1041
dbus.service.Object, it will add alternate D-Bus attributes with
1042
interface names according to the "alt_interface_names" mapping.
1043
Usage:
1044
1045
@alternate_dbus_interfaces({"org.example.Interface":
1046
"net.example.AlternateInterface"})
1047
class SampleDBusObject(dbus.service.Object):
1048
@dbus.service.method("org.example.Interface")
1049
def SampleDBusMethod():
1050
pass
1051
1052
The above "SampleDBusMethod" on "SampleDBusObject" will be
1053
reachable via two interfaces: "org.example.Interface" and
1054
"net.example.AlternateInterface", the latter of which will have
1055
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1056
"true", unless "deprecate" is passed with a False value.
1057
1058
This works for methods and signals, and also for D-Bus properties
1059
(from DBusObjectWithProperties) and interfaces (from the
1060
dbus_interface_annotations decorator).
1061
"""
1062
def wrapper(cls):
1063
for orig_interface_name, alt_interface_name in (
1064
alt_interface_names.items()):
1065
attr = {}
1066
interface_names = set()
1067
# Go though all attributes of the class
1068
for attrname, attribute in inspect.getmembers(cls):
1069
# Ignore non-D-Bus attributes, and D-Bus attributes
1070
# with the wrong interface name
1071
if (not hasattr(attribute, "_dbus_interface")
1072
or not attribute._dbus_interface
1073
.startswith(orig_interface_name)):
1074
continue
1075
# Create an alternate D-Bus interface name based on
1076
# the current name
1077
alt_interface = (attribute._dbus_interface
1078
.replace(orig_interface_name,
1079
alt_interface_name))
1080
interface_names.add(alt_interface)
1081
# Is this a D-Bus signal?
1082
if getattr(attribute, "_dbus_is_signal", False):
1083
# Extract the original non-method undecorated
1084
# function by black magic
1085
nonmethod_func = (dict(
1086
zip(attribute.func_code.co_freevars,
1087
attribute.__closure__))["func"]
1088
.cell_contents)
1089
# Create a new, but exactly alike, function
1090
# object, and decorate it to be a new D-Bus signal
1091
# with the alternate D-Bus interface name
1092
new_function = (dbus.service.signal
1093
(alt_interface,
1094
attribute._dbus_signature)
1095
(types.FunctionType(
1096
nonmethod_func.func_code,
1097
nonmethod_func.func_globals,
1098
nonmethod_func.func_name,
1099
nonmethod_func.func_defaults,
1100
nonmethod_func.func_closure)))
1101
# Copy annotations, if any
1102
try:
1103
new_function._dbus_annotations = (
1104
dict(attribute._dbus_annotations))
1105
except AttributeError:
1106
pass
1107
# Define a creator of a function to call both the
1108
# original and alternate functions, so both the
1109
# original and alternate signals gets sent when
1110
# the function is called
1111
def fixscope(func1, func2):
1112
"""This function is a scope container to pass
1113
func1 and func2 to the "call_both" function
1114
outside of its arguments"""
1115
def call_both(*args, **kwargs):
1116
"""This function will emit two D-Bus
1117
signals by calling func1 and func2"""
1118
func1(*args, **kwargs)
1119
func2(*args, **kwargs)
1120
return call_both
1121
# Create the "call_both" function and add it to
1122
# the class
1123
attr[attrname] = fixscope(attribute, new_function)
1124
# Is this a D-Bus method?
1125
elif getattr(attribute, "_dbus_is_method", False):
1126
# Create a new, but exactly alike, function
1127
# object. Decorate it to be a new D-Bus method
1128
# with the alternate D-Bus interface name. Add it
1129
# to the class.
1130
attr[attrname] = (dbus.service.method
1131
(alt_interface,
1132
attribute._dbus_in_signature,
1133
attribute._dbus_out_signature)
1134
(types.FunctionType
1135
(attribute.func_code,
1136
attribute.func_globals,
1137
attribute.func_name,
1138
attribute.func_defaults,
1139
attribute.func_closure)))
1140
# Copy annotations, if any
1141
try:
1142
attr[attrname]._dbus_annotations = (
1143
dict(attribute._dbus_annotations))
1144
except AttributeError:
1145
pass
1146
# Is this a D-Bus property?
1147
elif getattr(attribute, "_dbus_is_property", False):
1148
# Create a new, but exactly alike, function
1149
# object, and decorate it to be a new D-Bus
1150
# property with the alternate D-Bus interface
1151
# name. Add it to the class.
1152
attr[attrname] = (dbus_service_property
1153
(alt_interface,
1154
attribute._dbus_signature,
1155
attribute._dbus_access,
1156
attribute
1157
._dbus_get_args_options
1158
["byte_arrays"])
1159
(types.FunctionType
1160
(attribute.func_code,
1161
attribute.func_globals,
1162
attribute.func_name,
1163
attribute.func_defaults,
1164
attribute.func_closure)))
1165
# Copy annotations, if any
1166
try:
1167
attr[attrname]._dbus_annotations = (
1168
dict(attribute._dbus_annotations))
1169
except AttributeError:
1170
pass
1171
# Is this a D-Bus interface?
1172
elif getattr(attribute, "_dbus_is_interface", False):
1173
# Create a new, but exactly alike, function
1174
# object. Decorate it to be a new D-Bus interface
1175
# with the alternate D-Bus interface name. Add it
1176
# to the class.
1177
attr[attrname] = (dbus_interface_annotations
1178
(alt_interface)
1179
(types.FunctionType
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1185
if deprecate:
1186
# Deprecate all alternate interfaces
1187
iname="_AlternateDBusNames_interface_annotation{}"
1188
for interface_name in interface_names:
1189
@dbus_interface_annotations(interface_name)
1190
def func(self):
1191
return { "org.freedesktop.DBus.Deprecated":
1192
"true" }
1193
# Find an unused name
1194
for aname in (iname.format(i)
1195
for i in itertools.count()):
1196
if aname not in attr:
1197
attr[aname] = func
1198
break
1199
if interface_names:
1200
# Replace the class with a new subclass of it with
1201
# methods, signals, etc. as created above.
1202
cls = type(b"{}Alternate".format(cls.__name__),
1203
(cls,), attr)
1204
return cls
1205
return wrapper
1206
1207
1208
@alternate_dbus_interfaces({"se.recompile.Mandos":
1209
"se.bsnet.fukt.Mandos"})
1210
732
class ClientDBus(Client, DBusObjectWithProperties):
1211
733
"""A Client class using D-Bus
1212
734
1221
743
# dbus.service.Object doesn't use super(), so we can't either.
1222
744
1223
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
1224
747
self.bus = bus
1225
748
Client.__init__(self, *args, **kwargs)
1226
749
# Only now, when this client is initialized, can it show up on
1227
750
# the D-Bus
1228
client_object_name = str(self.name).translate(
751
client_object_name = unicode(self.name).translate(
1229
752
{ord("."): ord("_"),
1230
753
ord("-"): ord("_")})
1231
754
self.dbus_object_path = (dbus.ObjectPath
1232
755
("/clients/" + client_object_name))
1233
756
DBusObjectWithProperties.__init__(self, self.bus,
1234
757
self.dbus_object_path)
1235
1236
def notifychangeproperty(transform_func,
1237
dbus_name, type_func=lambda x: x,
1238
variant_level=1):
1239
""" Modify a variable so that it's a property which announces
1240
its changes to DBus.
1241
1242
transform_fun: Function that takes a value and a variant_level
1243
and transforms it to a D-Bus type.
1244
dbus_name: D-Bus name of the variable
1245
type_func: Function that transform the value before sending it
1246
to the D-Bus. Default: no transform
1247
variant_level: D-Bus variant level. Default: 1
1248
"""
1249
attrname = "_{}".format(dbus_name)
1250
def setter(self, value):
1251
if hasattr(self, "dbus_object_path"):
1252
if (not hasattr(self, attrname) or
1253
type_func(getattr(self, attrname, None))
1254
!= type_func(value)):
1255
dbus_value = transform_func(type_func(value),
1256
variant_level
1257
=variant_level)
1258
self.PropertyChanged(dbus.String(dbus_name),
1259
dbus_value)
1260
setattr(self, attrname, value)
1261
1262
return property(lambda self: getattr(self, attrname), setter)
1263
1264
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1265
approvals_pending = notifychangeproperty(dbus.Boolean,
1266
"ApprovalPending",
1267
type_func = bool)
1268
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1269
last_enabled = notifychangeproperty(datetime_to_dbus,
1270
"LastEnabled")
1271
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1272
type_func = lambda checker:
1273
checker is not None)
1274
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1275
"LastCheckedOK")
1276
last_checker_status = notifychangeproperty(dbus.Int16,
1277
"LastCheckerStatus")
1278
last_approval_request = notifychangeproperty(
1279
datetime_to_dbus, "LastApprovalRequest")
1280
approved_by_default = notifychangeproperty(dbus.Boolean,
1281
"ApprovedByDefault")
1282
approval_delay = notifychangeproperty(dbus.UInt64,
1283
"ApprovalDelay",
1284
type_func =
1285
lambda td: td.total_seconds()
1286
* 1000)
1287
approval_duration = notifychangeproperty(
1288
dbus.UInt64, "ApprovalDuration",
1289
type_func = lambda td: td.total_seconds() * 1000)
1290
host = notifychangeproperty(dbus.String, "Host")
1291
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
type_func = lambda td:
1293
td.total_seconds() * 1000)
1294
extended_timeout = notifychangeproperty(
1295
dbus.UInt64, "ExtendedTimeout",
1296
type_func = lambda td: td.total_seconds() * 1000)
1297
interval = notifychangeproperty(dbus.UInt64,
1298
"Interval",
1299
type_func =
1300
lambda td: td.total_seconds()
1301
* 1000)
1302
checker_command = notifychangeproperty(dbus.String, "Checker")
1303
1304
del notifychangeproperty
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
1305
802
1306
803
def __del__(self, *args, **kwargs):
1307
804
try:
1316
813
*args, **kwargs):
1317
814
self.checker_callback_tag = None
1318
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
1319
819
if os.WIFEXITED(condition):
1320
820
exitstatus = os.WEXITSTATUS(condition)
1321
821
# Emit D-Bus signal
1331
831
return Client.checker_callback(self, pid, condition, command,
1332
832
*args, **kwargs)
1333
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
1334
851
def start_checker(self, *args, **kwargs):
1335
old_checker_pid = getattr(self.checker, "pid", None)
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1336
857
r = Client.start_checker(self, *args, **kwargs)
1337
858
# Only if new checker process was started
1338
859
if (self.checker is not None
1339
860
and old_checker_pid != self.checker.pid):
1340
861
# Emit D-Bus signal
1341
862
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
1342
866
return r
1343
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
875
return r
876
1344
877
def _reset_approved(self):
1345
self.approved = None
878
self._approved = None
1346
879
return False
1347
880
1348
881
def approve(self, value=True):
1349
self.approved = value
1350
gobject.timeout_add(int(self.approval_duration.total_seconds()
1351
* 1000), self._reset_approved)
1352
882
self.send_changedstate()
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
1353
888
1354
889
## D-Bus methods, signals & properties
1355
_interface = "se.recompile.Mandos.Client"
1356
1357
## Interfaces
1358
1359
@dbus_interface_annotations(_interface)
1360
def _foo(self):
1361
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1362
"false"}
890
_interface = "se.bsnet.fukt.Mandos.Client"
1363
891
1364
892
## Signals
1365
893
1451
979
if value is None: # get
1452
980
return dbus.Boolean(self.approved_by_default)
1453
981
self.approved_by_default = bool(value)
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
1454
985
1455
986
# ApprovalDelay - property
1456
987
@dbus_service_property(_interface, signature="t",
1457
988
access="readwrite")
1458
989
def ApprovalDelay_dbus_property(self, value=None):
1459
990
if value is None: # get
1460
return dbus.UInt64(self.approval_delay.total_seconds()
1461
* 1000)
991
return dbus.UInt64(self.approval_delay_milliseconds())
1462
992
self.approval_delay = datetime.timedelta(0, 0, 0, value)
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
1463
996
1464
997
# ApprovalDuration - property
1465
998
@dbus_service_property(_interface, signature="t",
1466
999
access="readwrite")
1467
1000
def ApprovalDuration_dbus_property(self, value=None):
1468
1001
if value is None: # get
1469
return dbus.UInt64(self.approval_duration.total_seconds()
1470
* 1000)
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
1471
1004
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1472
1008
1473
1009
# Name - property
1474
1010
@dbus_service_property(_interface, signature="s", access="read")
1486
1022
def Host_dbus_property(self, value=None):
1487
1023
if value is None: # get
1488
1024
return dbus.String(self.host)
1489
self.host = str(value)
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1490
1029
1491
1030
# Created - property
1492
1031
@dbus_service_property(_interface, signature="s", access="read")
1493
1032
def Created_dbus_property(self):
1494
return datetime_to_dbus(self.created)
1033
return dbus.String(self._datetime_to_dbus(self.created))
1495
1034
1496
1035
# LastEnabled - property
1497
1036
@dbus_service_property(_interface, signature="s", access="read")
1498
1037
def LastEnabled_dbus_property(self):
1499
return datetime_to_dbus(self.last_enabled)
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1500
1041
1501
1042
# Enabled - property
1502
1043
@dbus_service_property(_interface, signature="b",
1516
1057
if value is not None:
1517
1058
self.checked_ok()
1518
1059
return
1519
return datetime_to_dbus(self.last_checked_ok)
1520
1521
# LastCheckerStatus - property
1522
@dbus_service_property(_interface, signature="n",
1523
access="read")
1524
def LastCheckerStatus_dbus_property(self):
1525
return dbus.Int16(self.last_checker_status)
1526
1527
# Expires - property
1528
@dbus_service_property(_interface, signature="s", access="read")
1529
def Expires_dbus_property(self):
1530
return datetime_to_dbus(self.expires)
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1531
1064
1532
1065
# LastApprovalRequest - property
1533
1066
@dbus_service_property(_interface, signature="s", access="read")
1534
1067
def LastApprovalRequest_dbus_property(self):
1535
return datetime_to_dbus(self.last_approval_request)
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1536
1073
1537
1074
# Timeout - property
1538
1075
@dbus_service_property(_interface, signature="t",
1539
1076
access="readwrite")
1540
1077
def Timeout_dbus_property(self, value=None):
1541
1078
if value is None: # get
1542
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1543
old_timeout = self.timeout
1079
return dbus.UInt64(self.timeout_milliseconds())
1544
1080
self.timeout = datetime.timedelta(0, 0, 0, value)
1545
# Reschedule disabling
1546
if self.enabled:
1547
now = datetime.datetime.utcnow()
1548
self.expires += self.timeout - old_timeout
1549
if self.expires <= now:
1550
# The timeout has passed
1551
self.disable()
1552
else:
1553
if (getattr(self, "disable_initiator_tag", None)
1554
is None):
1555
return
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
int((self.expires - now).total_seconds()
1560
* 1000), self.disable))
1561
1562
# ExtendedTimeout - property
1563
@dbus_service_property(_interface, signature="t",
1564
access="readwrite")
1565
def ExtendedTimeout_dbus_property(self, value=None):
1566
if value is None: # get
1567
return dbus.UInt64(self.extended_timeout.total_seconds()
1568
* 1000)
1569
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1570
1101
1571
1102
# Interval - property
1572
1103
@dbus_service_property(_interface, signature="t",
1573
1104
access="readwrite")
1574
1105
def Interval_dbus_property(self, value=None):
1575
1106
if value is None: # get
1576
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1577
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
1578
1112
if getattr(self, "checker_initiator_tag", None) is None:
1579
1113
return
1580
if self.enabled:
1581
# Reschedule checker run
1582
gobject.source_remove(self.checker_initiator_tag)
1583
self.checker_initiator_tag = (gobject.timeout_add
1584
(value, self.start_checker))
1585
self.start_checker() # Start one now, too
1586
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
1119
1587
1120
# Checker - property
1588
1121
@dbus_service_property(_interface, signature="s",
1589
1122
access="readwrite")
1590
1123
def Checker_dbus_property(self, value=None):
1591
1124
if value is None: # get
1592
1125
return dbus.String(self.checker_command)
1593
self.checker_command = str(value)
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1594
1131
1595
1132
# CheckerRunning - property
1596
1133
@dbus_service_property(_interface, signature="b",
1612
1149
@dbus_service_property(_interface, signature="ay",
1613
1150
access="write", byte_arrays=True)
1614
1151
def Secret_dbus_property(self, value):
1615
self.secret = bytes(value)
1152
self.secret = str(value)
1616
1153
1617
1154
del _interface
1618
1155
1623
1160
self._pipe.send(('init', fpr, address))
1624
1161
if not self._pipe.recv():
1625
1162
raise KeyError()
1626
1163
1627
1164
def __getattribute__(self, name):
1628
if name == '_pipe':
1165
if(name == '_pipe'):
1629
1166
return super(ProxyClient, self).__getattribute__(name)
1630
1167
self._pipe.send(('getattr', name))
1631
1168
data = self._pipe.recv()
1636
1173
self._pipe.send(('funcall', name, args, kwargs))
1637
1174
return self._pipe.recv()[1]
1638
1175
return func
1639
1176
1640
1177
def __setattr__(self, name, value):
1641
if name == '_pipe':
1178
if(name == '_pipe'):
1642
1179
return super(ProxyClient, self).__setattr__(name, value)
1643
1180
self._pipe.send(('setattr', name, value))
1644
1181
1652
1189
def handle(self):
1653
1190
with contextlib.closing(self.server.child_pipe) as child_pipe:
1654
1191
logger.info("TCP connection from: %s",
1655
str(self.client_address))
1192
unicode(self.client_address))
1656
1193
logger.debug("Pipe FD: %d",
1657
1194
self.server.child_pipe.fileno())
1658
1195
1659
1196
session = (gnutls.connection
1660
1197
.ClientSession(self.request,
1661
1198
gnutls.connection
1662
1199
.X509Credentials()))
1663
1200
1664
1201
# Note: gnutls.connection.X509Credentials is really a
1665
1202
# generic GnuTLS certificate credentials object so long as
1666
1203
# no X.509 keys are added to it. Therefore, we can use it
1667
1204
# here despite using OpenPGP certificates.
1668
1205
1669
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1670
1207
# "+AES-256-CBC", "+SHA1",
1671
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1677
1214
(gnutls.library.functions
1678
1215
.gnutls_priority_set_direct(session._c_object,
1679
1216
priority, None))
1680
1217
1681
1218
# Start communication using the Mandos protocol
1682
1219
# Get protocol number
1683
1220
line = self.request.makefile().readline()
1684
1221
logger.debug("Protocol version: %r", line)
1685
1222
try:
1686
1223
if int(line.strip().split()[0]) > 1:
1687
raise RuntimeError(line)
1224
raise RuntimeError
1688
1225
except (ValueError, IndexError, RuntimeError) as error:
1689
1226
logger.error("Unknown protocol version: %s", error)
1690
1227
return
1691
1228
1692
1229
# Start GnuTLS connection
1693
1230
try:
1694
1231
session.handshake()
1698
1235
# established. Just abandon the request.
1699
1236
return
1700
1237
logger.debug("Handshake succeeded")
1701
1238
1702
1239
approval_required = False
1703
1240
try:
1704
1241
try:
1709
1246
logger.warning("Bad certificate: %s", error)
1710
1247
return
1711
1248
logger.debug("Fingerprint: %s", fpr)
1712
1249
1713
1250
try:
1714
1251
client = ProxyClient(child_pipe, fpr,
1715
1252
self.client_address)
1723
1260
1724
1261
while True:
1725
1262
if not client.enabled:
1726
logger.info("Client %s is disabled",
1263
logger.warning("Client %s is disabled",
1727
1264
client.name)
1728
1265
if self.server.use_dbus:
1729
1266
# Emit D-Bus signal
1730
client.Rejected("Disabled")
1267
client.Rejected("Disabled")
1731
1268
return
1732
1269
1733
if client.approved or not client.approval_delay:
1270
if client._approved or not client.approval_delay:
1734
1271
#We are approved or approval is disabled
1735
1272
break
1736
elif client.approved is None:
1273
elif client._approved is None:
1737
1274
logger.info("Client %s needs approval",
1738
1275
client.name)
1739
1276
if self.server.use_dbus:
1740
1277
# Emit D-Bus signal
1741
1278
client.NeedApproval(
1742
client.approval_delay.total_seconds()
1743
* 1000, client.approved_by_default)
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
1744
1281
else:
1745
1282
logger.warning("Client %s was not approved",
1746
1283
client.name)
1750
1287
return
1751
1288
1752
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
1753
1291
time = datetime.datetime.now()
1754
1292
client.changedstate.acquire()
1755
client.changedstate.wait(delay.total_seconds())
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1756
1294
client.changedstate.release()
1757
1295
time2 = datetime.datetime.now()
1758
1296
if (time2 - time) >= delay:
1774
1312
try:
1775
1313
sent = session.send(client.secret[sent_size:])
1776
1314
except gnutls.errors.GNUTLSError as error:
1777
logger.warning("gnutls send failed",
1778
exc_info=error)
1315
logger.warning("gnutls send failed")
1779
1316
return
1780
1317
logger.debug("Sent: %d, remaining: %d",
1781
1318
sent, len(client.secret)
1782
1319
- (sent_size + sent))
1783
1320
sent_size += sent
1784
1321
1785
1322
logger.info("Sending secret to %s", client.name)
1786
# bump the timeout using extended_timeout
1787
client.bump_timeout(client.extended_timeout)
1323
# bump the timeout as if seen
1324
client.checked_ok()
1788
1325
if self.server.use_dbus:
1789
1326
# Emit D-Bus signal
1790
1327
client.GotSecret()
1795
1332
try:
1796
1333
session.bye()
1797
1334
except gnutls.errors.GNUTLSError as error:
1798
logger.warning("GnuTLS bye failed",
1799
exc_info=error)
1335
logger.warning("GnuTLS bye failed")
1800
1336
1801
1337
@staticmethod
1802
1338
def peer_certificate(session):
1858
1394
# Convert the buffer to a Python bytestring
1859
1395
fpr = ctypes.string_at(buf, buf_len.value)
1860
1396
# Convert the bytestring to hexadecimal notation
1861
hex_fpr = binascii.hexlify(fpr).upper()
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1862
1398
return hex_fpr
1863
1399
1864
1400
1867
1403
def sub_process_main(self, request, address):
1868
1404
try:
1869
1405
self.finish_request(request, address)
1870
except Exception:
1406
except:
1871
1407
self.handle_error(request, address)
1872
1408
self.close_request(request)
1873
1409
1874
1410
def process_request(self, request, address):
1875
1411
"""Start a new process to process the request."""
1876
proc = multiprocessing.Process(target = self.sub_process_main,
1877
args = (request, address))
1878
proc.start()
1879
return proc
1880
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
1881
1414
1882
1415
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1883
1416
""" adds a pipe to the MixIn """
1887
1420
This function creates a new pipe in self.pipe
1888
1421
"""
1889
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1890
1891
proc = MultiprocessingMixIn.process_request(self, request,
1892
client_address)
1423
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
1893
1426
self.child_pipe.close()
1894
self.add_pipe(parent_pipe, proc)
1895
1896
def add_pipe(self, parent_pipe, proc):
1427
self.add_pipe(parent_pipe)
1428
1429
def add_pipe(self, parent_pipe):
1897
1430
"""Dummy function; override as necessary"""
1898
raise NotImplementedError()
1899
1431
raise NotImplementedError
1900
1432
1901
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1902
1434
socketserver.TCPServer, object):
1908
1440
use_ipv6: Boolean; to use IPv6 or not
1909
1441
"""
1910
1442
def __init__(self, server_address, RequestHandlerClass,
1911
interface=None, use_ipv6=True, socketfd=None):
1912
"""If socketfd is set, use that file descriptor instead of
1913
creating a new one with socket.socket().
1914
"""
1443
interface=None, use_ipv6=True):
1915
1444
self.interface = interface
1916
1445
if use_ipv6:
1917
1446
self.address_family = socket.AF_INET6
1918
if socketfd is not None:
1919
# Save the file descriptor
1920
self.socketfd = socketfd
1921
# Save the original socket.socket() function
1922
self.socket_socket = socket.socket
1923
# To implement --socket, we monkey patch socket.socket.
1924
#
1925
# (When socketserver.TCPServer is a new-style class, we
1926
# could make self.socket into a property instead of monkey
1927
# patching socket.socket.)
1928
#
1929
# Create a one-time-only replacement for socket.socket()
1930
@functools.wraps(socket.socket)
1931
def socket_wrapper(*args, **kwargs):
1932
# Restore original function so subsequent calls are
1933
# not affected.
1934
socket.socket = self.socket_socket
1935
del self.socket_socket
1936
# This time only, return a new socket object from the
1937
# saved file descriptor.
1938
return socket.fromfd(self.socketfd, *args, **kwargs)
1939
# Replace socket.socket() function with wrapper
1940
socket.socket = socket_wrapper
1941
# The socketserver.TCPServer.__init__ will call
1942
# socket.socket(), which might be our replacement,
1943
# socket_wrapper(), if socketfd was set.
1944
1447
socketserver.TCPServer.__init__(self, server_address,
1945
1448
RequestHandlerClass)
1946
1947
1449
def server_bind(self):
1948
1450
"""This overrides the normal server_bind() function
1949
1451
to bind to an interface if one was specified, and also NOT to
1957
1459
try:
1958
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1959
1461
SO_BINDTODEVICE,
1960
(self.interface + "\0")
1961
.encode("utf-8"))
1462
str(self.interface
1463
+ '\0'))
1962
1464
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1967
1470
logger.error("SO_BINDTODEVICE not available;"
1968
1471
" cannot bind to interface %s",
1969
1472
self.interface)
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
1973
1473
else:
1974
1474
raise
1975
1475
# Only bind(2) the socket if we really need to.
1978
1478
if self.address_family == socket.AF_INET6:
1979
1479
any_address = "::" # in6addr_any
1980
1480
else:
1981
any_address = "0.0.0.0" # INADDR_ANY
1481
any_address = socket.INADDR_ANY
1982
1482
self.server_address = (any_address,
1983
1483
self.server_address[1])
1984
1484
elif not self.server_address[1]:
2005
1505
"""
2006
1506
def __init__(self, server_address, RequestHandlerClass,
2007
1507
interface=None, use_ipv6=True, clients=None,
2008
gnutls_priority=None, use_dbus=True, socketfd=None):
1508
gnutls_priority=None, use_dbus=True):
2009
1509
self.enabled = False
2010
1510
self.clients = clients
2011
1511
if self.clients is None:
2012
self.clients = {}
1512
self.clients = set()
2013
1513
self.use_dbus = use_dbus
2014
1514
self.gnutls_priority = gnutls_priority
2015
1515
IPv6_TCPServer.__init__(self, server_address,
2016
1516
RequestHandlerClass,
2017
1517
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
1518
use_ipv6 = use_ipv6)
2020
1519
def server_activate(self):
2021
1520
if self.enabled:
2022
1521
return socketserver.TCPServer.server_activate(self)
2023
2024
1522
def enable(self):
2025
1523
self.enabled = True
2026
2027
def add_pipe(self, parent_pipe, proc):
1524
def add_pipe(self, parent_pipe):
2028
1525
# Call "handle_ipc" for both data and EOF events
2029
1526
gobject.io_add_watch(parent_pipe.fileno(),
2030
1527
gobject.IO_IN | gobject.IO_HUP,
2031
1528
functools.partial(self.handle_ipc,
2032
parent_pipe =
2033
parent_pipe,
2034
proc = proc))
2035
1529
parent_pipe = parent_pipe))
1530
2036
1531
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2038
# error, or the other end of multiprocessing.Pipe has closed
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
# Wait for other process to exit
2041
proc.join()
1532
client_object=None):
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2042
1549
return False
2043
1550
2044
1551
# Read a request from the child
2049
1556
fpr = request[1]
2050
1557
address = request[2]
2051
1558
2052
for c in self.clients.itervalues():
1559
for c in self.clients:
2053
1560
if c.fingerprint == fpr:
2054
1561
client = c
2055
1562
break
2056
1563
else:
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2059
1566
if self.use_dbus:
2060
1567
# Emit D-Bus signal
2061
mandos_dbus_service.ClientNotFound(fpr,
2062
address[0])
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2063
1569
parent_pipe.send(False)
2064
1570
return False
2065
1571
2066
1572
gobject.io_add_watch(parent_pipe.fileno(),
2067
1573
gobject.IO_IN | gobject.IO_HUP,
2068
1574
functools.partial(self.handle_ipc,
2069
parent_pipe =
2070
parent_pipe,
2071
proc = proc,
2072
client_object =
2073
client))
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2074
1577
parent_pipe.send(True)
2075
# remove the old hook in favor of the new above hook on
2076
# same fileno
1578
# remove the old hook in favor of the new above hook on same fileno
2077
1579
return False
2078
1580
if command == 'funcall':
2079
1581
funcname = request[1]
2080
1582
args = request[2]
2081
1583
kwargs = request[3]
2082
1584
2083
parent_pipe.send(('data', getattr(client_object,
2084
funcname)(*args,
2085
**kwargs)))
2086
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1586
2087
1587
if command == 'getattr':
2088
1588
attrname = request[1]
2089
1589
if callable(client_object.__getattribute__(attrname)):
2090
1590
parent_pipe.send(('function',))
2091
1591
else:
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2094
1593
2095
1594
if command == 'setattr':
2096
1595
attrname = request[1]
2097
1596
value = request[2]
2098
1597
setattr(client_object, attrname, value)
2099
1598
2100
1599
return True
2101
1600
2102
1601
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2105
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2120
"""
2121
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2128
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2134
# containing digits
2135
"value", # datetime.timedelta or
2136
# None
2137
"followers")) # Tokens valid after
2138
# this token
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2152
None,
2153
frozenset((token_hour, token_minute,
2154
token_second)))
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2170
token_week)))
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2173
found_token = None
2174
followers = frozenset((token_duration,)) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2182
# Token found
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2190
# Go to found token
2191
found_token = token
2192
# Set valid next tokens
2193
followers = found_token.followers
2194
break
2195
else:
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2198
# End token found
2199
return value
2200
2201
2202
1602
def string_to_delta(interval):
2203
1603
"""Parse a string and return a datetime.timedelta
2204
1604
2215
1615
>>> string_to_delta('5m 30s')
2216
1616
datetime.timedelta(0, 330)
2217
1617
"""
2218
2219
try:
2220
return rfc3339_duration_to_delta(interval)
2221
except ValueError:
2222
pass
2223
2224
1618
timevalue = datetime.timedelta(0)
2225
1619
for s in interval.split():
2226
1620
try:
2227
suffix = s[-1]
1621
suffix = unicode(s[-1])
2228
1622
value = int(s[:-1])
2229
1623
if suffix == "d":
2230
1624
delta = datetime.timedelta(value)
2237
1631
elif suffix == "w":
2238
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2239
1633
else:
2240
raise ValueError("Unknown suffix {!r}"
2241
.format(suffix))
2242
except IndexError as e:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2243
1636
raise ValueError(*(e.args))
2244
1637
timevalue += delta
2245
1638
return timevalue
2246
1639
2247
1640
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
2248
1665
def daemon(nochdir = False, noclose = False):
2249
1666
"""See daemon(3). Standard BSD Unix function.
2250
1667
2258
1675
sys.exit()
2259
1676
if not noclose:
2260
1677
# Close all standard open file descriptors
2261
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2262
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
2263
raise OSError(errno.ENODEV, "{} not a character device"
2264
.format(os.devnull))
1680
raise OSError(errno.ENODEV,
1681
"%s not a character device"
1682
% os.path.devnull)
2265
1683
os.dup2(null, sys.stdin.fileno())
2266
1684
os.dup2(null, sys.stdout.fileno())
2267
1685
os.dup2(null, sys.stderr.fileno())
2276
1694
2277
1695
parser = argparse.ArgumentParser()
2278
1696
parser.add_argument("-v", "--version", action="version",
2279
version = "%(prog)s {}".format(version),
1697
version = "%%(prog)s %s" % version,
2280
1698
help="show version number and exit")
2281
1699
parser.add_argument("-i", "--interface", metavar="IF",
2282
1700
help="Bind to interface IF")
2288
1706
help="Run self-test")
2289
1707
parser.add_argument("--debug", action="store_true",
2290
1708
help="Debug mode; run in foreground and log"
2291
" to terminal", default=None)
1709
" to terminal")
2292
1710
parser.add_argument("--debuglevel", metavar="LEVEL",
2293
1711
help="Debug level for stdout output")
2294
1712
parser.add_argument("--priority", help="GnuTLS"
2301
1719
" files")
2302
1720
parser.add_argument("--no-dbus", action="store_false",
2303
1721
dest="use_dbus", help="Do not provide D-Bus"
2304
" system bus interface", default=None)
1722
" system bus interface")
2305
1723
parser.add_argument("--no-ipv6", action="store_false",
2306
dest="use_ipv6", help="Do not use IPv6",
2307
default=None)
2308
parser.add_argument("--no-restore", action="store_false",
2309
dest="restore", help="Do not restore stored"
2310
" state", default=None)
2311
parser.add_argument("--socket", type=int,
2312
help="Specify a file descriptor to a network"
2313
" socket to use instead of creating one")
2314
parser.add_argument("--statedir", metavar="DIR",
2315
help="Directory to save/restore state in")
2316
parser.add_argument("--foreground", action="store_true",
2317
help="Run in foreground", default=None)
2318
parser.add_argument("--no-zeroconf", action="store_false",
2319
dest="zeroconf", help="Do not use Zeroconf",
2320
default=None)
2321
1724
dest="use_ipv6", help="Do not use IPv6")
2322
1725
options = parser.parse_args()
2323
1726
2324
1727
if options.check:
2325
1728
import doctest
2326
fail_count, test_count = doctest.testmod()
2327
sys.exit(os.EX_OK if fail_count == 0 else 1)
1729
doctest.testmod()
1730
sys.exit()
2328
1731
2329
1732
# Default values for config file for server-global settings
2330
1733
server_defaults = { "interface": "",
2332
1735
"port": "",
2333
1736
"debug": "False",
2334
1737
"priority":
2335
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2336
1739
"servicename": "Mandos",
2337
1740
"use_dbus": "True",
2338
1741
"use_ipv6": "True",
2339
1742
"debuglevel": "",
2340
"restore": "True",
2341
"socket": "",
2342
"statedir": "/var/lib/mandos",
2343
"foreground": "False",
2344
"zeroconf": "True",
2345
1743
}
2346
1744
2347
1745
# Parse config file for server-global settings
2352
1750
# Convert the SafeConfigParser object to a dict
2353
1751
server_settings = server_config.defaults()
2354
1752
# Use the appropriate methods on the non-string config options
2355
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1753
for option in ("debug", "use_dbus", "use_ipv6"):
2356
1754
server_settings[option] = server_config.getboolean("DEFAULT",
2357
1755
option)
2358
1756
if server_settings["port"]:
2359
1757
server_settings["port"] = server_config.getint("DEFAULT",
2360
1758
"port")
2361
if server_settings["socket"]:
2362
server_settings["socket"] = server_config.getint("DEFAULT",
2363
"socket")
2364
# Later, stdin will, and stdout and stderr might, be dup'ed
2365
# over with an opened os.devnull. But we don't want this to
2366
# happen with a supplied network socket.
2367
if 0 <= server_settings["socket"] <= 2:
2368
server_settings["socket"] = os.dup(server_settings
2369
["socket"])
2370
1759
del server_config
2371
1760
2372
1761
# Override the settings from the config file with command line
2373
1762
# options, if set.
2374
1763
for option in ("interface", "address", "port", "debug",
2375
1764
"priority", "servicename", "configdir",
2376
"use_dbus", "use_ipv6", "debuglevel", "restore",
2377
"statedir", "socket", "foreground", "zeroconf"):
1765
"use_dbus", "use_ipv6", "debuglevel"):
2378
1766
value = getattr(options, option)
2379
1767
if value is not None:
2380
1768
server_settings[option] = value
2381
1769
del options
2382
1770
# Force all strings to be unicode
2383
1771
for option in server_settings.keys():
2384
if isinstance(server_settings[option], bytes):
2385
server_settings[option] = (server_settings[option]
2386
.decode("utf-8"))
2387
# Force all boolean options to be boolean
2388
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
"foreground", "zeroconf"):
2390
server_settings[option] = bool(server_settings[option])
2391
# Debug implies foreground
2392
if server_settings["debug"]:
2393
server_settings["foreground"] = True
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
2394
1774
# Now we have our good server settings in "server_settings"
2395
1775
2396
1776
##################################################################
2397
1777
2398
if (not server_settings["zeroconf"] and
2399
not (server_settings["port"]
2400
or server_settings["socket"] != "")):
2401
parser.error("Needs port or socket to work without"
2402
" Zeroconf")
2403
2404
1778
# For convenience
2405
1779
debug = server_settings["debug"]
2406
1780
debuglevel = server_settings["debuglevel"]
2407
1781
use_dbus = server_settings["use_dbus"]
2408
1782
use_ipv6 = server_settings["use_ipv6"]
2409
stored_state_path = os.path.join(server_settings["statedir"],
2410
stored_state_file)
2411
foreground = server_settings["foreground"]
2412
zeroconf = server_settings["zeroconf"]
2413
2414
if debug:
2415
initlogger(debug, logging.DEBUG)
2416
else:
2417
if not debuglevel:
2418
initlogger(debug)
2419
else:
2420
level = getattr(logging, debuglevel.upper())
2421
initlogger(debug, level)
2422
1783
2423
1784
if server_settings["servicename"] != "Mandos":
2424
1785
syslogger.setFormatter(logging.Formatter
2425
('Mandos ({}) [%(process)d]:'
2426
' %(levelname)s: %(message)s'
2427
.format(server_settings
2428
["servicename"])))
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
2429
1789
2430
1790
# Parse config file with clients
2431
client_config = configparser.SafeConfigParser(Client
2432
.client_defaults)
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
2433
1799
client_config.read(os.path.join(server_settings["configdir"],
2434
1800
"clients.conf"))
2435
1801
2436
1802
global mandos_dbus_service
2437
1803
mandos_dbus_service = None
2438
1804
2439
socketfd = None
2440
if server_settings["socket"] != "":
2441
socketfd = server_settings["socket"]
2442
1805
tcp_server = MandosServer((server_settings["address"],
2443
1806
server_settings["port"]),
2444
1807
ClientHandler,
2447
1810
use_ipv6=use_ipv6,
2448
1811
gnutls_priority=
2449
1812
server_settings["priority"],
2450
use_dbus=use_dbus,
2451
socketfd=socketfd)
2452
if not foreground:
2453
pidfilename = "/run/mandos.pid"
2454
if not os.path.isdir("/run/."):
2455
pidfilename = "/var/run/mandos.pid"
2456
pidfile = None
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
2457
1816
try:
2458
1817
pidfile = open(pidfilename, "w")
2459
except IOError as e:
2460
logger.error("Could not open file %r", pidfilename,
2461
exc_info=e)
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
2462
1820
2463
for name in ("_mandos", "mandos", "nobody"):
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
2464
1825
try:
2465
uid = pwd.getpwnam(name).pw_uid
2466
gid = pwd.getpwnam(name).pw_gid
2467
break
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
2468
1828
except KeyError:
2469
continue
2470
else:
2471
uid = 65534
2472
gid = 65534
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
2473
1835
try:
2474
1836
os.setgid(gid)
2475
1837
os.setuid(uid)
2476
1838
except OSError as error:
2477
if error.errno != errno.EPERM:
2478
raise
1839
if error[0] != errno.EPERM:
1840
raise error
2479
1841
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
1849
2480
1850
if debug:
2481
1851
# Enable all possible GnuTLS debugging
2482
1852
2492
1862
.gnutls_global_set_log_function(debug_gnutls))
2493
1863
2494
1864
# Redirect stdin so all checkers get /dev/null
2495
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2496
1866
os.dup2(null, sys.stdin.fileno())
2497
1867
if null > 2:
2498
1868
os.close(null)
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
2499
1872
2500
1873
# Need to fork before connecting to D-Bus
2501
if not foreground:
1874
if not debug:
2502
1875
# Close all input and output, do double fork, etc.
2503
1876
daemon()
2504
1877
2505
# multiprocessing will use threads, so before we use gobject we
2506
# need to inform gobject that threads will be used.
2507
gobject.threads_init()
2508
2509
1878
global main_loop
2510
1879
# From the Avahi example code
2511
DBusGMainLoop(set_as_default=True)
1880
DBusGMainLoop(set_as_default=True )
2512
1881
main_loop = gobject.MainLoop()
2513
1882
bus = dbus.SystemBus()
2514
1883
# End of Avahi example code
2515
1884
if use_dbus:
2516
1885
try:
2517
bus_name = dbus.service.BusName("se.recompile.Mandos",
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2518
1887
bus, do_not_queue=True)
2519
old_bus_name = (dbus.service.BusName
2520
("se.bsnet.fukt.Mandos", bus,
2521
do_not_queue=True))
2522
1888
except dbus.exceptions.NameExistsException as e:
2523
logger.error("Disabling D-Bus:", exc_info=e)
1889
logger.error(unicode(e) + ", disabling D-Bus")
2524
1890
use_dbus = False
2525
1891
server_settings["use_dbus"] = False
2526
1892
tcp_server.use_dbus = False
2527
if zeroconf:
2528
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
service = AvahiServiceToSyslog(name =
2530
server_settings["servicename"],
2531
servicetype = "_mandos._tcp",
2532
protocol = protocol, bus = bus)
2533
if server_settings["interface"]:
2534
service.interface = (if_nametoindex
2535
(server_settings["interface"]
2536
.encode("utf-8")))
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
2537
1900
2538
1901
global multiprocessing_manager
2539
1902
multiprocessing_manager = multiprocessing.Manager()
2541
1904
client_class = Client
2542
1905
if use_dbus:
2543
1906
client_class = functools.partial(ClientDBus, bus = bus)
2544
2545
client_settings = Client.config_parser(client_config)
2546
old_client_settings = {}
2547
clients_data = {}
2548
2549
# This is used to redirect stdout and stderr for checker processes
2550
global wnull
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2553
# mode
2554
if debug or not foreground:
2555
wnull.close()
2556
2557
# Get client data and settings from last running state.
2558
if server_settings["restore"]:
2559
try:
2560
with open(stored_state_path, "rb") as stored_state:
2561
clients_data, old_client_settings = (pickle.load
2562
(stored_state))
2563
os.remove(stored_state_path)
2564
except IOError as e:
2565
if e.errno == errno.ENOENT:
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
2568
else:
2569
logger.critical("Could not load persistent state:",
2570
exc_info=e)
2571
raise
2572
except EOFError as e:
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
2575
2576
with PGPEngine() as pgp:
2577
for client_name, client in clients_data.items():
2578
# Skip removed clients
2579
if client_name not in client_settings:
2580
continue
2581
2582
# Decide which value to use after restoring saved state.
2583
# We have three different values: Old config file,
2584
# new config file, and saved state.
2585
# New config value takes precedence if it differs from old
2586
# config value, otherwise use saved state.
2587
for name, value in client_settings[client_name].items():
2588
try:
2589
# For each value in new config, check if it
2590
# differs from the old config value (Except for
2591
# the "secret" attribute)
2592
if (name != "secret" and
2593
value != old_client_settings[client_name]
2594
[name]):
2595
client[name] = value
2596
except KeyError:
2597
pass
2598
2599
# Clients who has passed its expire date can still be
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2603
# downtime.
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2607
logger.warning(
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2613
logger.warning(
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2618
client["enabled"] = False
2619
else:
2620
client["expires"] = (datetime.datetime
2621
.utcnow()
2622
+ client["timeout"])
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.format(client_name))
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
2626
1914
try:
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2630
["secret"]))
2631
except PGPError:
2632
# If decryption fails, we use secret from new settings
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2636
client_settings[client_name]["secret"])
2637
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2645
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2651
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
2652
1924
if not tcp_server.clients:
2653
1925
logger.warning("No clients defined")
2654
2655
if not foreground:
2656
if pidfile is not None:
2657
try:
2658
with pidfile:
2659
pid = os.getpid()
2660
pidfile.write("{}\n".format(pid).encode("utf-8"))
2661
except IOError:
2662
logger.error("Could not write to file %r with PID %d",
2663
pidfilename, pid)
2664
del pidfile
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
2665
1939
del pidfilename
2666
1940
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
2667
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2669
1945
2670
1946
if use_dbus:
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
1947
class MandosDBusService(dbus.service.Object):
2674
1948
"""A D-Bus proxy object"""
2675
1949
def __init__(self):
2676
1950
dbus.service.Object.__init__(self, bus, "/")
2677
_interface = "se.recompile.Mandos"
2678
2679
@dbus_interface_annotations(_interface)
2680
def _foo(self):
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2683
"false"}
1951
_interface = "se.bsnet.fukt.Mandos"
2684
1952
2685
1953
@dbus.service.signal(_interface, signature="o")
2686
1954
def ClientAdded(self, objpath):
2701
1969
def GetAllClients(self):
2702
1970
"D-Bus method"
2703
1971
return dbus.Array(c.dbus_object_path
2704
for c in
2705
tcp_server.clients.itervalues())
1972
for c in tcp_server.clients)
2706
1973
2707
1974
@dbus.service.method(_interface,
2708
1975
out_signature="a{oa{sv}}")
2710
1977
"D-Bus method"
2711
1978
return dbus.Dictionary(
2712
1979
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
1980
for c in tcp_server.clients),
2714
1981
signature="oa{sv}")
2715
1982
2716
1983
@dbus.service.method(_interface, in_signature="o")
2717
1984
def RemoveClient(self, object_path):
2718
1985
"D-Bus method"
2719
for c in tcp_server.clients.itervalues():
1986
for c in tcp_server.clients:
2720
1987
if c.dbus_object_path == object_path:
2721
del tcp_server.clients[c.name]
1988
tcp_server.clients.remove(c)
2722
1989
c.remove_from_connection()
2723
1990
# Don't signal anything except ClientRemoved
2724
1991
c.disable(quiet=True)
2733
2000
2734
2001
def cleanup():
2735
2002
"Cleanup function; run on exit"
2736
if zeroconf:
2737
service.cleanup()
2738
2739
multiprocessing.active_children()
2740
wnull.close()
2741
if not (tcp_server.clients or client_settings):
2742
return
2743
2744
# Store client before exiting. Secrets are encrypted with key
2745
# based on what config file has. If config file is
2746
# removed/edited, old secret will thus be unrecovable.
2747
clients = {}
2748
with PGPEngine() as pgp:
2749
for client in tcp_server.clients.itervalues():
2750
key = client_settings[client.name]["secret"]
2751
client.encrypted_secret = pgp.encrypt(client.secret,
2752
key)
2753
client_dict = {}
2754
2755
# A list of attributes that can not be pickled
2756
# + secret.
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
2761
exclude.add(name)
2762
2763
client_dict["encrypted_secret"] = (client
2764
.encrypted_secret)
2765
for attr in client.client_structure:
2766
if attr not in exclude:
2767
client_dict[attr] = getattr(client, attr)
2768
2769
clients[client.name] = client_dict
2770
del client_settings[client.name]["secret"]
2771
2772
try:
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2780
except (IOError, OSError) as e:
2781
if not debug:
2782
try:
2783
os.remove(tempname)
2784
except NameError:
2785
pass
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2789
else:
2790
logger.warning("Could not save persistent state:",
2791
exc_info=e)
2792
raise
2793
2794
# Delete all clients, and settings from config
2003
service.cleanup()
2004
2795
2005
while tcp_server.clients:
2796
name, client = tcp_server.clients.popitem()
2006
client = tcp_server.clients.pop()
2797
2007
if use_dbus:
2798
2008
client.remove_from_connection()
2009
client.disable_hook = None
2799
2010
# Don't signal anything except ClientRemoved
2800
2011
client.disable(quiet=True)
2801
2012
if use_dbus:
2802
2013
# Emit D-Bus signal
2803
mandos_dbus_service.ClientRemoved(client
2804
.dbus_object_path,
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2805
2015
client.name)
2806
client_settings.clear()
2807
2016
2808
2017
atexit.register(cleanup)
2809
2018
2810
for client in tcp_server.clients.itervalues():
2019
for client in tcp_server.clients:
2811
2020
if use_dbus:
2812
2021
# Emit D-Bus signal
2813
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
# Need to initiate checking of clients
2815
if client.enabled:
2816
client.init_checker()
2023
client.enable()
2817
2024
2818
2025
tcp_server.enable()
2819
2026
tcp_server.server_activate()
2820
2027
2821
2028
# Find out what port we got
2822
if zeroconf:
2823
service.port = tcp_server.socket.getsockname()[1]
2029
service.port = tcp_server.socket.getsockname()[1]
2824
2030
if use_ipv6:
2825
2031
logger.info("Now listening on address %r, port %d,"
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
2828
2034
else: # IPv4
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
2831
2037
2832
2038
#service.interface = tcp_server.socket.getsockname()[3]
2833
2039
2834
2040
try:
2835
if zeroconf:
2836
# From the Avahi example code
2837
try:
2838
service.activate()
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2841
cleanup()
2842
sys.exit(1)
2843
# End of Avahi example code
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
2844
2049
2845
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
2051
lambda *args, **kwargs:
2850
2055
logger.debug("Starting main loop")
2851
2056
main_loop.run()
2852
2057
except AvahiError as error:
2853
logger.critical("Avahi Error", exc_info=error)
2058
logger.critical("AvahiError: %s", error)
2854
2059
cleanup()
2855
2060
sys.exit(1)
2856
2061
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0